Photoexcitation of Bipolaron in Conducting Polymers
LI Sheng1,2, LONG De-Shun1, SUN Xin1,2
1State Key Laboratory of Surface Science and Research Center for Theoretical Physics, Fudan University, Shanghai 200433
2China National Laboratory of Infrared Physics, Shanghai Institute of Applied Physics, Shanghai 200083
Photoexcitation of Bipolaron in Conducting Polymers
LI Sheng1,2;LONG De-Shun1;SUN Xin1,2
1State Key Laboratory of Surface Science and Research Center for Theoretical Physics, Fudan University, Shanghai 200433
2China National Laboratory of Infrared Physics, Shanghai Institute of Applied Physics, Shanghai 200083
Abstract： We theoretically study the photoexcitation process in a conducting polymer with a non-degenerate ground state, where the carrier without spin is bipolaron. The dynamical simulation reveals a photoinduced phenomenon that a positive bipolaron is split into two polarons by absorbing one photon. The relaxation time of this photoinduced bipolaron-split is about 40 fs. It is predicted that this photoinduced phenomenon can be detected experimentally by observing the change of magnetic susceptibility.
LI Sheng;LONG De-Shun;SUN Xin;. Photoexcitation of Bipolaron in Conducting Polymers[J]. 中国物理快报, 2002, 19(5): 657-658.
LI Sheng, LONG De-Shun, SUN Xin,. Photoexcitation of Bipolaron in Conducting Polymers. Chin. Phys. Lett., 2002, 19(5): 657-658.
2002, Vol. 19 
